Question

If ∫(dx/(x - x³)) = A ln|x²/(1 - x²)| + c,  then A is equal to

(A) 2

(B) 1/2

(C) 2/3

(D) 1/4

Answer 1

Answer is (B) 1/2

Let 1/x² = t. Then - 2/x³dx = dt.

Therefore,